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Focal dystonia, also called focal task-specific dystonia, is a neurological condition that affects a muscle or group of muscles in a specific part of the body during specific activities, causing involuntary muscular contractions and abnormal postures.
A hypnic jerk, hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment.
Similarly, neuroscientists have come to learn much about music cognition by studying music-specific disorders. Even though music is most often viewed from a "historical perspective rather than a biological one" [ 1 ] music has significantly gained the attention of neuroscientists all around the world.
In fact, up to 20% of those with writer's cramp have a family member with some form of dystonia. [ 7 ] Musician's cramp (a similar focal dystonia which affects less than 1% of instrumentalists [ 10 ] ) has historically been grouped together with writer's cramp because of this and their common task-specificity.
Myoclonus is a brief, involuntary, irregular (lacking rhythm) twitching of a muscle, a joint, or a group of muscles, different from clonus, which is rhythmic or regular.. Myoclonus (myo-"muscle", clonus "spasm") describes a medical sign and, generally, is not a diagnosis of a dis
Psychomotor agitation is a symptom in various disorders and health conditions. It is characterized by unintentional and purposeless motions and restlessness, often but not always accompanied by emotional distress and is always an indicative for admission.
The fingers can move as if playing the piano. There may be tongue fasciculations ("bag of worms") and motor impersistence , for example, the "milkmaid sign" (grip strength fluctuates, as if hand milking a cow), or inability to sustain tongue protrusion (called jack-in-the-box tongue [ 5 ] or serpentine tongue, [ 6 ] as the tongue slides in and ...
One of the most striking features of Indian classical dance and dances of Thailand, [1] Cambodia, Laos, Myanmar and the Malay world is the use of hand gestures. Speaking in dance via gestures in order to convey outer events or things visually is what mudras do. To convey inner feelings, two classifications of mudras (hand or finger gesture) are ...